Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Lauren Bonzelaar, MD, MS

Individual provider Anesthesiology Physician · NPI 1396109153

Lauren Bonzelaar, MD, MS practises Anesthesiology in Chicago, Illinois. Graduated from R Franklin University of Med & SCI/Chicago Medical School in 2015, 11 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
11
Trained at
R Franklin University of Med & SCI/Chicago Medical School
Licensed in
IL
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

251 E Huron St Ste 5-704
Chicago, IL 60611-2908
Phone: (312) 695-0061
Fax: (312) 695-9013
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 036.149779 (IL)

Record details

NPI number1396109153
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MS
Sole proprietorNo
NPI enumeratedApril 7, 2016
Last updated in NPPESMay 13, 2026
Certification dateMay 13, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolR FRANKLIN UNIVERSITY OF MED & SCI/CHICAGO MEDICAL SCHOOL
Graduated 2015 (11 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients296
Services billed 310 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Northwestern Medical Faculty Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4394 clinicians in the practice; 12 are shown here.

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